#pragma once
#include<iostream>
#include<unistd.h>
#include<sys/socket.h>
#include<sys/types.h>
#include<arpa/inet.h>
#include<cstring>
#include<cstdlib>

class Socket
{
public:
    static int SocketCreate()
    {
        int sock = socket(AF_INET,SOCK_STREAM,0);
        if(sock < 0)
        {
            std::cerr << "socket error" << std::endl;
            exit(1);
        }
        int opt = 1;
        setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,&opt,sizeof(opt));
        return sock;
    }
    static void SocketBind(int sock,int port)
    {
        struct sockaddr_in local;
        local.sin_family = AF_INET;
        local.sin_port = htons(port);
        local.sin_addr.s_addr = INADDR_ANY;

        socklen_t len = sizeof(local);
        if(bind(sock,(struct sockaddr*)&local,len) < 0)
        {
            std::cerr << "bind error" << std::endl;
            exit(2);
        }
    }
    static void SocketListen(int sock,int backlog)
    {
        if(listen(sock,backlog) < 0)
        {
            std::cerr << "listen error" << std::endl;
            exit(3);
        }
    }
};